Crossover in the adsorption properties of alkali metals on graphene
SCIE
SCOPUS
- Title
- Crossover in the adsorption properties of alkali metals on graphene
- Authors
- Jin Kyung-Hwan; Choi, SM; Jhi Seung-Hoon
- Date Issued
- 2010-07-30
- Publisher
- AMER PHYSICAL SOC
- Abstract
- The adsorption of alkali metals (AMs) on single layer graphene is studied using first principles methods. We observe a common trend in the binding distance, the charge transfer, and the work function (W) at certain coverage of AMs with increase in the proportion rho (adatom/C atom) of the graphene covered by the AM. A dip in these properties occurs at rho approximate to 0.04 for all AMs except Li, for which it occurs at rho approximate to 0.08. This behavior is due to a transition of adsorbed metals from individual atoms to two-dimensional metallic sheets that exert a depolarization effect. W of graphene exhibits asymmetric dependence on rho : a dip in the adatom layer side but saturation on the graphene side, which is in contrast to the case of bulk graphite.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25827
- DOI
- 10.1103/PHYSREVB.82.033414
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 82, no. 3, page. 33414, 2010-07-30
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